Food with a red fork icon in the top right corner is health food, meaning it mostly gives health with only a little stamina. Food with a yellow fork symbol gives mostly stamina, not much health. It sounds like you don't have a problem with enemies, so try to eat at least 2 stamina foods and only one health food. I'm not sure what part of the game you're in, but a general rule of thumb is that meat foods usually give health and plants like berries or carrots give stamina.